and sign up for Free
STEP 2 : There you will get a a link something like this
STEP 3 :
Now you need to copy above link and paste in your facebook status box OR send direct message to your friends
Make sure that your status or message will be surprised
ie : "I have never seen such an accurate love calculating app like this "
(with your link) or do something new which you think will be suitable
Now just wait for few minutes. Definitely after seeing your status many of your friends will enter their crush names and will get trapped . You will receive an email whenever any friend of you enter the details there.